The following 5 updates are available for Debian:

[DLA 170-1] mod-gnutls security update
[DLA 171-1] libssh2 security update
[DLA 172-1] libextlib-ruby security update
[DSA 3186-1] nss security update
[DSA 3187-1] icu security update

[DLA 170-1] mod-gnutls security update

Package : mod-gnutls
Version : 0.5.6-1+squeeze2
CVE ID : CVE-2015-2091
Debian Bug : 578663

Thomas Klute discovered that in mod-gnutls, an Apache module providing
SSL and TLS encryption with GnuTLS, a bug caused the server's client
verify mode not to be considered at all, in case the directory's
configuration was unset. Clients with invalid certificates were then
able to leverage this flaw in order to get access to that directory.

[DLA 171-1] libssh2 security update

Package : libssh2
Version : 1.2.6-1+deb6u1
CVE ID : CVE-2015-1782
Debian Bug : 780249

Mariusz Ziulek reported that libssh2, a SSH2 client-side library, was
reading and using the SSH_MSG_KEXINIT packet without doing sufficient
range checks when negotiating a new SSH session with a remote server. A
malicious attacker could man in the middle a real server and cause a
client using the libssh2 library to crash (denial of service) or
otherwise read and use unintended memory areas in this process.

[DLA 172-1] libextlib-ruby security update

Package : libextlib-ruby
Version : 0.9.13-2+deb6u1
CVE ID : CVE-2013-0156
Debian Bug : 697895

Import patches 633974b2759d9b92 and 4540e7102b803624 from uptream to
remove symbol and YAML coercion from the XML parser.

[DSA 3186-1] nss security update

- -------------------------------------------------------------------------
Debian Security Advisory DSA-3186-1 security@debian.org
http://www.debian.org/security/ Salvatore Bonaccorso
March 13, 2015 http://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : nss
CVE ID : CVE-2014-1569
Debian Bug : 773625

It was discovered that the Mozilla Network Security Service library
(nss) incorrectly handled certain ASN.1 lengths. A remote attacker could
possibly use this issue to perform a data-smuggling attack.

For the stable distribution (wheezy), this problem has been fixed in
version 2:3.14.5-1+deb7u4.

For the upcoming stable distribution (jessie), this problem has been
fixed in version 2:3.17.2-1.1.

For the unstable distribution (sid), this problem has been fixed in
version 2:3.17.2-1.1.

We recommend that you upgrade your nss packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/

[DSA 3187-1] icu security update

- -------------------------------------------------------------------------
Debian Security Advisory DSA-3187-1 security@debian.org
http://www.debian.org/security/ Michael Gilbert
March 15, 2015 http://www.debian.org/security/faq
- -------------------------------------------------------------------------

Package : icu
CVE ID : CVE-2013-1569 CVE-2013-2383 CVE-2013-2384 CVE-2013-2419
CVE-2014-6585 CVE-2014-6591 CVE-2014-7923 CVE-2014-7926
CVE-2014-7940 CVE-2014-9654
Debian Bug : 775884 776264 776265 776719

Several vulnerabilities were discovered in the International Components
for Unicode (ICU) library.

CVE-2013-1569

Glyph table issue.

CVE-2013-2383

Glyph table issue.

CVE-2013-2384

Font layout issue.

CVE-2013-2419

Font processing issue.

CVE-2014-6585

Out-of-bounds read.

CVE-2014-6591

Additional out-of-bounds reads.

CVE-2014-7923

Memory corruption in regular expression comparison.

CVE-2014-7926

Memory corruption in regular expression comparison.

CVE-2014-7940

Uninitialized memory.

CVE-2014-9654

More regular expression flaws.

For the stable distribution (wheezy), these problems have been fixed in
version 4.8.1.1-12+deb7u2.

For the upcoming stable (jessie) and unstable (sid) distributions, these
problems have been fixed in version 52.1-7.1.

We recommend that you upgrade your icu packages.

Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/